Thanks Jim for the details, I'II just have to metricize your imperial numbers first (when are you guys going to catch up with the rest of the metric world????) but the scope of the difference in weight is exactly what I am trying to sus out.
I will be going with a small block so I suspect the variation will be marginally less, but something around 70kg I think sounds about right and far outsrips most other weight saving options, body work aside.
I'II just keep on reading
regards
